Fuel Sample Port

240zdave

240zdave

New member
I am planning on using Jiffy-Tite fittings for the fuel sample port on the new race car. I will be installing a female quick-disconnect like this behind the gas door:

http://www.summitracing.com/parts/JIF-21306/

The description says this fitting is valved. My questions are, does it need to be "valved", and if so, does the male plug also need to be valved, like this one:

http://www.summitracing.com/parts/JIF-22506P/

The male end will have a piece of rubber hose attached to it, and it will only get plugged into the female fitting if a sample is required. Anyone else using this setup?
 
I have a totally different arrangement, but with the on-car fitting valved and the removable fitting not. The connection point is below the free end of the hose, so it is impossible to disconnect it without spilling fuel. If the removable fitting were valved then the fuel would stay in the hose when removed.
 
We've got something along those lines on our car, with the sample port T'd off of the main fuel line right before it connects to the fuel rail.

The car also has a toggle switch (airplane-style, with the cover to prevent accidental use) beside the port to let us power the fuel pump right there. Sorta overkill, but it came that way....

I like it a lot, especially when compared to some of the other stuff I've seen and dealt with over the years.
 
until there's a fuel test that anyone uses (and has confidence in) the port will be an easy tech inspection at impound and nothing more. a required item that serves no current real purpose.

they are useful for draining tanks when you don't have a drain in the tank, so if you fall in that group, make a setup that works well for that purpose.
 
In 3 yrs and about 50 national races, I've been asked for a fuel sample ONCE. At a track that the Sunoco fuel in the track's tanks was deemed illegal!! (so basically they just let anyone run whatever and it didn't matter since the only fuel available in the area was illegal..)

anyway, I have a fuelport as well.
I saw a couple GTL guys with setups similar to what David was suggesting. female dry-break quick-disconnect fitting on the fuel supply line, male plug with about 12" of hose on the sample line. the guy had it zip-tied to the frame rail next to the sample port.

so he would turn his fuel pump on at the dash, then plug the hose in and fill the tube.
 
Eagle7 said:
I have a totally different arrangement, but with the on-car fitting valved and the removable fitting not. The connection point is below the free end of the hose, so it is impossible to disconnect it without spilling fuel. If the removable fitting were valved then the fuel would stay in the hose when removed.
Click to expand...

I think that answers my question. Since the quick disconnect is on the side of the car behind the gas flap, when the male fitting is plugged into the female socket on the car, the free end of the hose on the other end of the male fitting will be below the connection point, so all of the fuel should fall into whatever container is holding the sample, therefore, no valve would be necessary on the male fitting. Thanks.
 
First, please quote and repost on the rules thread.
1) Have you been beat by a car using illegal fuel?
2) Does your region have a test kit?
3) Do you think that the current street fuel @90/10 will pass?
4) Have you ever been tested?
5) How does the rule help the regional racer, RE to additional fuel leak point, cost, etc.
The ARRC cars will have supps supporting the test port .
Thanks, MM
 
240zdave said:
I am planning on using Jiffy-Tite fittings for the fuel sample port on the new race car. I will be installing a female quick-disconnect like this behind the gas door:

http://www.summitracing.com/parts/JIF-21306/

The description says this fitting is valved. My questions are, does it need to be "valved", and if so, does the male plug also need to be valved, like this one:

http://www.summitracing.com/parts/JIF-22506P/

The male end will have a piece of rubber hose attached to it, and it will only get plugged into the female fitting if a sample is required. Anyone else using this setup?
Click to expand...

I have that exact setup in my GTL. It's on the "high pressure" side of my carbureted fuel system meaning it sees about 15psi. The female fitting is valved and the male is not.

The female fitting is plumbed into the fuel line between one pump and the filter. I keep the male fitting with a piece of hose on a near by frame rail using a velcro zip tie thingie.

When asked for a sample (I've been asked about 6-10 times) I just pull off the velcro, plug the hose in, turn on a pump and ... whah lah ...

I also put caps on both ends of the sample hose when it's not in use, since I'm paranoid that some crud is going to get in there and throw off the fuel sample.

It's also handy for doing pump outs.

-Kyle
 
Last edited:
disquek said:
I have that exact setup in my GTL. It's on the "high pressure" side of my carbureted fuel system meaning it sees about 15psi. The female fitting is valved and the male is not.

The female fitting is plumbed into the fuel line between one pump and the filter. I keep the male fitting with a piece of hose on a near by frame rail using a velcro zip tie thingie.

When asked for a sample (I've been asked about 6-10 times) I just pull off the velcro, plug the hose in, turn on a pump and ... whah lah ...

I also put caps on both ends of the sample hose when it's not in use, since I'm paranoid that some crud is going to get in there and throw off the fuel sample.

It's also handy for doing pump outs.

-Kyle
Click to expand...
Well, Jiffy-Tite it is, with a slight variation. The tech guy at Jiffy-Tite advised me to go with a male plug on the bulkhead fitting instead of female, and then the operation of hooking up the hose is one-handed (pull back the sleeve on the female fitting and push it on). Makes more sense than the way I was going to do it.
 
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